If you want the real Hitman 3 (World of Assassination), you need a modern PC, PlayStation, or Xbox. For Android, stick to PS2 emulation (AetherSX2) or the official Hitman: Sniper mobile game.
If isoroms.com is down, consider legitimate backup sites like CDRomance (known for clean, pre-patched ISOs) or Internet Archive (where old PSP dumps are often hosted legally). If you want the real Hitman 3 (World